This ETS defines the Terrestrial Trunked Radio (TETRA) system supporting Voice plus Data (V+D). In accordance with ITU-T Recommendations I.130 [28], the stage one, stage two and stage three of the three level structure is used to specify the TETRA gateway to Public Integrated Services Digital Network (ISDN):
PUBLISHED
SSH ETS 300 392-4-2:2000 ed.1
60.60
Standard published
Sep 11, 2025